An electric cable of copper has just one wire of radius 9 mm. Its resistance is |
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b) |
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c) |
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An electric cable of copper has just one wire of radius 9 mm. Its resistance is |
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a) |
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b) |
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c) |
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d) |
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(a) For one wire cable, Resistance, For other wire of cable, Resistance, When six wires each of resistance |
Two resistance and
are joined as shown in the figure to two batteries of e.m.f.
and
If
is short-circuited, the current through
is
a) |
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b) |
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c) |
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d) |
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